Extracting method of citrus flavanone and preparation method of dihydrochalcone

A technology of citrus flavanones and extraction methods, which is applied in the field of extraction of citrus flavanones and preparation of dihydrochalcones, which can solve resource waste, low yield and purity of dihydrochalcones, and great environmental hazards etc., to achieve the effects of reducing mass transfer and heat transfer resistance, accelerating solvation effect, and shortening processing time

Active Publication Date: 2018-10-16
HUNAN AGRI PRODS PROCESSING INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these methods can improve the purity of the product, they have disadvantages such as long process flow, complicated operation, high cost, and high solvent residue, and the organic solvent used is extremely harmful to the environment. Complexity, long time and other shortcomings, but also produce a large amount of waste water, easy to cause secondary pollution to the environment, does not meet environmental protection requirements, so these processes are no longer suitable for modern industrial production
In addition, the existing extraction methods can only extract one of the citrus flavanones, and cannot extract multiple citrus flavanones at the same time, so that other flavanones contained in the citrus peel and Citrus aurantium are discarded without being used, which is easy to cause resource waste. waste
Furthermore, since citrus peels and citrus citrus fruits contain pigments, and the existing extraction methods dissolve the impurity components together with citrus flavanones, which has a great impact on the purification of citrus flavanones, and it is difficult to obtain high-purity citrus flavanones. ketone
Therefore, low yield and low purity citrus flavanones are not conducive to the preparation of high yield and high purity dihydrochalcones, and the existing preparation methods have problems such as low yield and purity of dihydrochalcones

Method used

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  • Extracting method of citrus flavanone and preparation method of dihydrochalcone
  • Extracting method of citrus flavanone and preparation method of dihydrochalcone
  • Extracting method of citrus flavanone and preparation method of dihydrochalcone

Examples

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Effect test

Embodiment 1

[0045] A method for extracting citrus flavanones, the process flow chart is as figure 1 shown, including the following steps:

[0046] (1) Drying and ultrafinely pulverizing the orange peel to obtain citrus peel powder, wherein the particle size of the citrus peel powder is 40 μm.

[0047] (2) According to the solid-liquid ratio of citrus peel powder and acid is 1g: 15mL, the citrus peel powder obtained in step (1) is added in the hydrochloric acid solution with a pH value of 1.8, ultrasonically extracted for 1h, filtered, and the filtered solid is Dry at 50°C to obtain citrus pomace. The resulting filtrate can be used to extract pectin.

[0048] (3) According to the mass ratio of gac and citrus peels, it is 5%, the citrus peels in the step (2) and gac are mixed uniformly, the gained mixture is packed into subcritical extraction kettle, according to the weight ratio of deoxygenated distilled water and citrus peels Add deoxygenated distilled water at a ratio of 1:8, and feed...

Embodiment 2

[0054] A kind of preparation method of dihydrochalcone, process flow chart is as figure 2 shown, including the following steps:

[0055] (1) Add 20 kg of the citrus flavanone powder prepared in Example 1 into 1 L of dimethyl sulfoxide (DMSO), and mix to obtain a citrus flavanone solution.

[0056] (2) According to the volume ratio of citrus flavanone solution and dilute sulfuric acid solution is 1: 50, the citrus flavanone solution obtained in step (1) is added to dilute sulfuric acid solution (the volume concentration of this dilute sulfuric acid solution is 0.25% , the temperature is 65°C), mix evenly, put the obtained mixed solution into an autoclave for hydrolysis reaction, the specific hydrolysis reaction is: carry out the first hydrolysis reaction at 140°C for 25 minutes, cool, and then continue to heat to 140°C The second hydrolysis reaction was carried out at ℃ for 25 minutes, and the hesperidin in the citrus flavanone was hydrolyzed into hesperetin and hesperetin-7-...

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Abstract

The invention discloses an extracting method of citrus flavanone and a preparation method of dihydrochalcone. The extracting method comprises the following steps: drying and performing ultra-micro crushing on citrus peel and/or fructus aurantii immaturus; mixing citrus peel powder with acid to ultrasonically extract; performing three-time subcritical water extraction on citrus peel slag; and mixing filtrate obtained by three-time subcritical water extraction, concentrating under reduced pressure, and freeze-drying to obtain citrus flavanone. The preparation method comprises the following steps: performing hydrolysis reaction on citrus flavanone; enabling a hydrolysis mixture to perform enzymatic reaction; performing hydrogenation reaction on a powder mixture; regulating the pH value of a hydrogenation solution, standing, filtering, and freeze-drying to obtain dihydrochalcone. The extracting method has the advantages of simple process, convenient operation, low cost, environmental friendliness, high extracting efficiency, high resource utilization rate and the like; and the obtained product is high in yield and is high in purity. The preparation method has the advantages of simple process, convenient operation, low cost, greenness, environmental friendliness and the like; and the obtained product is high in yield and is high in purity.

Description

technical field [0001] The invention belongs to the technical field of biological separation and chemical synthesis, and relates to an extraction and synthesis process of citrus active ingredients, in particular to an extraction method of citrus flavanones and a preparation method of dihydrochalcone. Background technique [0002] Dihydrochalcone (Dihydrochalcone) compounds (dihydrochalcone for short) is one of the sweeteners widely concerned at present, including neohesperidin dihydrochalcone (Neohesperidin Dihydrochalcone), naringin dihydrochalcone Hydrochalcone (Naringin Dihydrochalcone) and Hesperetin Dihydrochalcone-4'-D-glucoside. Neohesperidin dihydrochalcone and naringin dihydrochalcone are very sweet, 1500-1800 times and 1000 times sweeter than sucrose, respectively. Dihydrochalcone sweetener has refreshing and pleasant sweetness, long-lasting aftertaste, excellent bitterness shielding effect, and extremely small calorie value (8.36J / g). It has become a sugar substi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D311/32C07D311/40C07C49/782C07C45/65C12P19/60
CPCC07C45/65C07D311/32C07D311/40C12P19/60C07C49/782
Inventor 单杨梁曾恩妮郭佳婧付复华肖业成苏瑾
Owner HUNAN AGRI PRODS PROCESSING INST
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